EXPERIMENTAL INVESTIGATION ON STRAIN DISTRIBUTION IN REINFORCEMENT OF RC SPECIMENS UNDER TENSION LOADING

Author(s): Gintaris Kaklauskas, Mantas Juknys, Ronaldas Jakubovskis, Eugenijus Gudonis, Regimantas Ramanauskas, Viktor Gribniak, Aleksandr Sokolov
Paper category: Proceedings
Book title: proceedings of the International RILEM Conference on Materials, Systems and Structures in Civil Engineering Conference segment on Service Life of Cement-Based Materials and Structures
Editor(s): Miguel Azenha, Ivan Gabrijel, Dirk Schlicke, Terje Kanstad and Ole Mejlhede Jensen
ISBN:978-2-35158-170-4
e-ISBN: 978-2-35158-173-5
Publisher: RILEM Publications SARL
Publication year: 2016
Pages: 296-303
Total Pages: 8
Language : English

Abstract: The interaction of reinforcement and the surrounding concrete is fundamental to the
understanding of the behaviour of reinforced concrete. There are a number of aspects to this
problem which include an understanding of bond behaviour, cracking behaviour and the
related problem of tension stiffening. The phenomenon of cracking and the structural
behaviour of cracked reinforced concrete are topics of current investigation. This paper
presents the use of a Fibre Bragg Grating optical system for measuring steel strains, bond
stress and slip of a reinforcing bar relative to its surrounding concrete, between cracks. Tests
were performed on concrete prisms of 260 mm length. Specimens were reinforced with 10
and 20 mm diameter ribbed bars. The bars had been instrumented along the edge to
accommodate a longitudinal narrow groove in which two arrays of FBG sensors were
installed. The obtained strain profiles of the specimens for various loading levels are
presented. A brief description is given a newly proposed method to determine the mean crack
spacing of RC ties. The experiments serve in part as a way to validate key assumptions of the
proposed approach and in part as a way to test the Fibre Brag Grating optical sensing system
for strain measurement.

Online publication : 2016
Publication type : full_text
Public price (Euros) : 0.00